Shape shape = new RoundRectangle2D.Float(0f, 0f, 240f, 64f, 32f, 32f);
JButton button2 = new JButton("not use Window#setShape(...)");
button2.addActionListener(e -> {
JWindow window = new JWindow();
window.setBackground(new Color(0x0, true));
window.getContentPane().add(makePanel(shape));
window.pack();
window.setLocationRelativeTo(((AbstractButton) e.getSource()).getRootPane());
window.setVisible(true);
});
// ...
private Component makePanel(Shape shape) {
JPanel panel = new JPanel(new BorderLayout()) {
@Override public Dimension getPreferredSize() {
return shape.getBounds().getSize();
}
@Override protected void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D) g.create();
g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC, .5f));
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2.setPaint(Color.RED);
g2.fill(shape);
g2.dispose();
super.paintComponent(g);
}
};
panel.setOpaque(false);
panel.setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));
// ...
return panel;
}
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Java
,
Kotlin
